Although it includes a suggestion to only buy verified Canon batteries (which is what any manufacturer would prefer), the bulletin isn't about typical 3rd party aftermarket batteries. Rather, it is about
counterfeit
batteries. I.e. batteries that claim to be OEM Canon, but actually are not.

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Woody -

Equipment: Enough. For now.

Quote: 'The only thing some people will believe is their own eyes. But in the realm of the quality of a printed image, is there really anything else that can be believed? '